Helix combination wood-carving attachment



- 9 P. B. FYLE HELIX COMBINATION WOOD CARVING ATTACHMENT Filed July 29,1933 3 Sheets-Sheet 2 Dec. 1, 1935. P. B. PYLE 2,023,489

HELIX COMBINATION WOOD CARVING ATTACHMENT I Filed July 29, 1955 sSheets-Sheet s several designs.

combination of straight, parallel designs.

Patented Dec. 10, 1935 PATENT OFFICE 'HELIX COMBINATION WOOD-CARVINGATTACHMENT Percy B. Pyle, Lewistown, Pa.

.Applicatien 'July29, 1933, Serial No. 682,869

Claims.

The object of my invention is to provide an attachment for cutting orimpressing ornamental designs upon a surface. This particular embodimentthereof has been selected for thepurpose of illustrating an attachmentfor forming the peripheral surfaces of such articles as wood moldings,novelties, etc. Such ornamentations are commonly referred to in this artas fiuting. In the past all such fluting has been done by the useofseveral machines requiring different attachments for irregularsurfaces and to make the The present invention contemplates anattachment, to fasten on the longitudinal section of the improved latheand synchronized to the lathe spindle. Said attachment provides means"for cutting convexo-concave helical lines or grooves on the straight,taper, ovate-oblong or parallel, peripheral surface; producing anornamentation to give convoluted-ogee designs, 'and many diamond shapedesigns; a y attachment consists essentiallyof a flexible shaft,

compound rest'rotating and traversing devices equipped with suitabledifferential "mechanism, .pu1l-pin,and means for suitablyrevolvingthework tothe fluting cutters; together withnovel stops,bearingand controlling devices for thesattachment.

indexing Iattain these and other'objects of myinventioniby'the'mechanism illustrated in the accompanying drawings, in which--Figure 1 is a top 'plan'view of my invention; Fig. .2 is a top plan ofthe control carriage whichiszmovable on the rods I and which carriestheconvoluted bar 24;

' Fig.3 is a view'partly in side elevation and partlyin vertical sectionon the line"33 of 'FigfZ illustrating the cutter controlling mechanism;*FigMl-is a detail elevational view of the patterncontrol convoluted barshowing a bar having a right hand twist;

."Fig. 5 is an end elevation of the gears and disk mechanism;controlledby the convoluted bar and interchangeable gear adapter;

Fig. #6 is a horizontal section on thelineB-B -of Fig.5;

'ratus.

like numerals designate likerpartsin each of the several views.

Referring-to the accompanyingdrawings, the deviceis an attachment to alathe having end .framermembersi,rsupports 23 (as shownin Fig.

5), and longitudinal frame members 4. The machine has a pair of spacedparallel rods '1 on which ;a novel control carriage 3| is slidablymounted. I provide a combinationtool rest and guide 3 laterallyadjustable on the frame bars '4 and supporting the guide rods l as shownin Figs. 1 and 9. Member-5 designates the conventional lathe tailstockhaving a work engaging end 6; and member 8 is the lathe head stockhavingthe Work engaging end 1, 10

I provide a disk 5 having an integral hub member II, as shown in Figs. 1and 6, and also having a series of spaced perforations disposedannularly-around the disk. Disk 9 is rotatably mounted in casing 55.Casing l5 is provided with the spring pressedlocking or pull pin'l3'having the pull knob 42 and spring I4. Pinl3 may engage anyof theperforations it. I provide set screw 18 detachably-securingsgear H tomember I5. I provide asecond gear 18 arrangedto mesh 0 with gear I7,Gear 18 is provided-with-a'slot-lfl to receive the convoluted bar or thereversely convoluted bar -24,'either of which bars may-be '20 secured togear it by "suitable screws, bolts,

or rivets Ilia. I also provide an inner ring or adapter 200, as shownin'Fig. 6 threaded as shown in ring 20 and recessed to receivethe ring2012.

I also provide a suitable stop lookscrew or bolt 200 as shown in'zFigs.'5 and 6. Referring toFig. '6'hub II is provided with a suitable setscrew 22 to releasably engage the work supporting element 1. Referringto Fig. 2, the bar (or bar'25as the case may be) is secured to thecontrol carriage 3| by screw or 40 stud '26.

Referring to Figs. 2 and 3, I provide a screw '30 seated in ring 35, andhaving an operating handle 28 affixed to its upper end. Ring '35terminates in depending rods 34 which are mounted'inthe control carriage3i.

For certain work, positioned in place of screw 30 I provide andsubstitute a. pin 29 having a reduced portion 38 on which is mounted aspring 39 of the diameter shown and which is retained on the pin bysuitable means 39a such as the cotter pin and washer shown. I provide acompound rest 36 swivelly mounted on ring 35 and adapted to be fastenedin any desired position by the 5. .screwll. As shown in Fig. 3, thecontrol carriage 3| is provided with slits and channels to permit ofslidably mounting the carriage on rods I. I also provide suitable bolts32. I also provide a guideway lock nut and screw 33 securing controlcarriage 3| to guide rods 34; or permitting the carriage 3| to slideloosely on said rod when not fastened in an adjusted position.

As shown in Fig. l, I proide a flexible shaft 43 which drives the cutter40 having a casing 4| and holder 42 for member 4| is supported by thecompound rest 36 and detachably secured thereon by bolt 31.

I provide suitable stop members for the control carriage, such as thestop bolt 44 shown in Fig. 2 and which may be mounted in any one of theperforations 2|. I may also provide for quick adjustment suitable stops45 slidably mounted on one of the two rods and having set screws forfastening the stops in an adjusted position.

The element on which ornamental work is to be performed is designated inthe drawings as W7!I In using the apparatus the appropriate bar 25 or 24may be mounted in the machine according to whether it is desired to cuta groove on the piece of work in a right hand direction or in a lefthand direction, the metal bar 25 having a right hand twist and the metalbar 24 a left hand twist.

The grooves in element W are made by the cutter 40 which is operated byflexible shaft 43, the holder element 4| being carried by the swivellymounted compound rest 36 which may be fastened in an adjusted positionon the ring 35 which in turn is supported by rods 34 mounted in thecontrol carriage 3|. The bars 24 and 25 reciprocate through the slot I9of gear l8 to control the pattern and thus a variety of ornamentalgrooves may be cut in the work element W, the cutter being operable overa straight or irregular peripheral surface. Reversely convoluted bars 24and 25 may be alternately used for producing reversely disposed helicalgroovers in the article ornamented. Also the convoluted bars may beremoved entirely to make parallel flutes.

While cutting ovate-oblong or irregular peripheral surfaces, the screw33 in Fig. 3 is replaced by pir 29 and spring 39 leaving the cutter freeto slide vertically on the guide rods 34 as the head stock or controlcarriage 3| in Fig. 3 is moved over the irregular surfaces in ahorizontal position. Depth washers on each of the cutters rest on top ofwood while cutter is fluting to the proper depth.

The cross section drawing of Fig. 3 shows how the convoluted bars 24 and25 are cut away to hinge when the one end of the longitudinal guide baris elevated in a vertical position to cut over tapered peripheralsurfaces. able convoluted bars 24 and 25 are fastened by the stud 26 tothe carriage 3| and either one of these bars traversed by hand in ahorizontal position through the guide-way in bearing I9 reciprocatingand with gear I8 is synchronized with the lathe spindle through thepull-pin I3, to give clockwise and counter-clockwise motions.

In Fig. 6 a bearing base 201) the same height as lathe center, onbearing lock nut 23, is fastened to a change gear by screws Hi. In theback of |9 screw 200 is put in place and convoluted bar is removed, thislocking the lathe spindle with the gears. Compound rest 36 is set 90degrees to cut parallel longitudinally spur convexo-concave or irregularperipheral surfaces.

Perforated index plate 9 in Fig. 6 works inside The interchangeof thefingers or sector |5a of member l5 and is fastened to the lathe spindleby set screw 22. Sector or plate I5 carries a pull-pin l3 held inengagement with a perforation in the index plate by spring l4. Workbeing synchronized the pullpin 13 is pulled out and the periphery of thework advanced on the lathe center to start the nex cut. The flexibleshaft member 4| shown in Fig. 1, is fastened in compound rest 36 byscrew 2'! in fixed spots to give the various angles and center thecutter on the helix angle that is to be cut. By the handle 28, and rapidscrew 33 takes the cutter downward into the work and is removed whenreturning the head stock or carriage 3| to stop 44 (or stop 45). Simpleindexing as heretofore described is completed and operation continued.

The pin 29 (with its spring 39) works between the guideways 34 and headstocks 3| (when substituted for screw 39 shown in Fig. 3) to keep atension on the flexible shaft and cutter while going over irregularsurfaces.

Standing in vertical position the head stock or carriage 3| in. Fig. 3has a precision alignment by screws 32 to adjust the head stock on thelongitudinal section guide-way Member 33 in Fig. 3 is a lock screwholding the guide rods 34 in place while cutting straight or taperedperipheral surfaces.

I provide collars 41, as shown in Fig. 1 arranged on each side of thecutter 40 to rest on top of the wood, each side of the flute being cutto control the depth of the cut.

What I claim is:

1. In a wood carving attachment, the combination with a lathe having atail stock and head stock of rods extending longitudinally of the frameof the lathe, a rest and guide adjustably attached to the underside ofthe frame of the lathe and supporting said rods in a laterallyadjustable relation thereto, a control carriage slidably mounted on saidlongitudinal rods. a vertically movable device adjustably mounted in thecontrol carriage, a flexible shaft, a compound rest swivelly mounted onsaid device and adapted to support the flexible shaft, and a cuttercarried by said flexible shaft, a screw having its unthreaded portionmounted in the aforesaid vertically removable device and having itsthreaded portion mounted in the control carriage, and a handle on theend of said screw for rapid operation of same, a convoluted bar havingone of its ends pivotally connected to the control carriage, a gearhaving a central guideway slot of suitable size to receive theconvoluted bar and permit it to slide therethrough, a second gear inmesh with the first gear, a casing affixed to and rotating with saidgear, a disk loosely mounted in the casing and having annular spacedperforations which may be releasably engaged to cause the saidperforated disk to rotate with the casing, said perforated disk alsohaving a hub, and a set screw in said hub to secure the disk to therotating shaft of a lathe.

2. In a wood carving attachment, the combination of rods extendinglongitudinally of the frame of a lathe, a rest and guide adjustablyattached to the underside of the frame of a lathe and supporting saidrods in a laterally adjustable relation thereto, a control carriageslidably support the flexible shaft, a cutter carried by said flexibleshaft, a convoluted bar having one of its ends connected to the controlcarriage, a gear having a central guideway slot of suitable size toreceive the convoluted bar and permit it to slide therethrough, a secondgear in mesh with the first gear, a casing affixed to and rotating withsaid gear, a disk loosely mounted in the casing and having annularspaced perforations which may be releasably engaged to cause the saidperforated disk to rotate with the casing, said perforated disk alsohaving a hub, and a set screw in said hub to secure the disk to therotating shaft of the lathe.

3. In a wood carving attachment, the combination of rods extendinglongitudinally of the frame of a lathe, a rest and guide adjustablyattached to the underside of the frame of a lathe and supporting saidrods in a laterally adjustable relation thereto, a control carriageslidably mounted on said longitudinal rods, a vertically movable deviceadjustably mounted in the control carriage, a flexible shaft, a compoundrest swivelly mounted on said device and adapted to support the flexibleshaft, a cutter carried by said flexible shaft, a perforated convolutedhelical bar which may be operatively connected to the control carriage,a gear having a central guideway slot of suitable size to receive theconvoluted bar and permit it to slide therethrough, a second gear inmesh with the first gear, a casing affixed to and rotating with saidgear, a pull pin mounted in said casing, a disk loosely mounted in theeasing and having annular spaced perforations with which said pull pinmay be releasably engaged to cause the said perforated disk to rotatewith the casing; said perforated disk also having a hub, and a set screwin said hub to secure the disk to the rotating shaft of a lathe.

4. In a wood carving attachment, the combination of rods extendinglongitudinally of the frame of a lathe, a rest and guide adjustablyattached to the underside of the frame of a lathe and supporting saidrods in a laterally adjustable relation thereto, a control carriageslidably mounted on said longitudinal rods, a vertically movable deviceadjustably mounted in the control carriage, a flexible shaft, a compoundrest swivelly mounted on said device and adapted to support the flexibleshaft, a cutter carried by said flexible shaft, a screw having itsunthreaded portion mounted in the aforesaid vertically movable deviceand having its threaded portion mounted in the control carriage, and ahandle on the end of said screw for rapid operation of same.

5. In a wood carving attachment, the combination of rods extendinglongitudinally of the frame of a lathe, a rest and guide adjustablyattached to the underside of the frame of the lathe and supporting saidrods in a laterally adjustable relation thereto, a control carriageslidably mounted on said longitudinal rods, a vertically movable deviceadjustably mounted in the control carriage, a guide Way lock nut, aflexible shaft, a compound rest swivelly mounted on said device andadapted to support the flexible shaft, a cutter carried by the flexibleshaft, a removable pin and a spring mounted in the aforesaid verticallymovable device to keep a tension on the flexible shaft and cutter Whilegoing over irregular surfaces, a perforated convoluted helical bar whichmay be operatively connected to the control carriage, a gear having acentral guide way slot of suitable size to receive the convoluted barand permit it to slide therethrough, a change gear lock nut or screw, asecond gear in mesh with the first.

PERCY B. PYLE.

